Heat Flow Calculation

Enter value and click on calculate. Result will be displayed.
Temperature of Hot Surface (F) :
Temperature of Cold Surface (F) :
Conductivity of Material (Btu-in) :
Area (ft2) :
Thickness (inches) :
Result:
Calculated Heat Flow :

What is Heat Flow Calculation?

Heat flow calculation determines the rate at which heat energy transfers between objects or systems due to temperature differences. It follows the laws of thermodynamics and helps in designing insulation, HVAC systems, and industrial processes.

Why is Heat Flow Calculation Important?

  • Ensures energy efficiency in buildings
  • Prevents overheating in machinery
  • Helps in thermal management of electronics
  • Aids in climate control systems

How is Heat Flow Calculated?

The most common formula is:

Where:

  • Q = Heat transfer rate (W)
  • k = Thermal conductivity (W/m·K)
  • A = Surface area (m²)
  • ΔT = Temperature difference (K or °C)
  • d = Thickness of the material (m)

Other methods include Fourier’s Law for conduction, Newton’s Law of Cooling for convection, and the Stefan-Boltzmann Law for radiation.

When is Heat Flow Calculation Used?

  • Building insulation analysis
  • Heat exchanger design
  • Furnace and reactor engineering
  • Cooling of electronic components
  • Weather and climate studies